Daewoo Chassis Cn-001g Microphone Failure
You did not try disconnecting the yoke, this chassis fails the yoke and lowers the voltage of + B and turns off the TV.
Well friend if all these tests are done, everything is correct, for me if the problem is the one I101 chip, since without those 8 volts they do not reach pin 42 the ic does not start working.
And if you connect pin 42 and disconnect pin 32, does the voltage drop? Try that test to see what happens?
Hello friends sorry for the delay in responding I had a personal problem and could not work, I commented that I only performed the test that the electronic colleague told me to connect everything and disconnect pin 32 of I101 and all this is correct voltages are fine and even on pin 42 there are 8v and on pin 32 there are 5.7 v check the line of pin 32 and I didn't find anything damaged that they suggest to me alone and perform this test
It is still premature to "accuse" the Micro (I701) of being defective, check that D851: Zener 9.1V is not defective. If you connect R877 but release a terminal to R874: 6.2K, the source must deliver all normal voltages, just like the previous test.
In this condition, when connecting the TV to the mains, we have in I701 >> 11: ST-BY (5 V) and 29: POWER (0 V); on I101 >> 28: POWER ON CONTROL (0 V) and 47: SW 8.7V REG OUT (0 V), check if there is a change to the power order from the CR / Remote Control) and from the Panel (keyboard ) >> 0 V; 5 V; 5V and 8.7V, respectively
Perform the test that you indicated friend joansoler connect the r877 and disconnect the r874 the diode is fine In Estambay I have on I701
pin 11 st-by (5v)
pin 29 power (0v)
and on I101 pin 28 power on control (0v)
pin 47 sw (0v)
these voltages are in state stamp now when giving the ignition order octengo
on I701 pin 11 of (5v) it goes to (0v)
pin 29 of (0v) passes to (5v)
on I101 pin 28 of (0v) it goes to (5v)
and pin 47 of (0v) goes to (8.6v) and when I turn off the voltage of pin 47 it goes very slowly until it is at (0v)
what do you recomend
Alright, this rules out a breakdown of the Micro. As for the Jungle it does it partially, but let's see how its internal block that acts as a horizontal oscillator responds: It restores EVERYTHING to its original state. but this time remove L805 and instead temporarily install a filament lamp, which will light only on the order of ignition and not before. Comment result of this test.
Let's go back to the previous state, where all the voltages delivered by the source were normal, but this time soldering the bulb on the 2 terminals of C814: 100uF / 160V, this in order to test the performance of the source, when required or demand of current by the "load" (light bulb).
I told him to perform the test by disconnecting and disconnecting the r874 with the bulb in the c814 the result was a tic tic tic and there is no voltage now I explain by chance to the destination the light bulb that had 100 w this one fell off and even I get there is one of 25w and I think that is why this tic tic tic is the reason for the source and the other problem is that right now here in Venezuela where I live it is quite difficult to get 100 and 200w light bulb that you recommend
A filament lamp (bulb) of 100W for 110V / 127V AC is TOO much for this test, because it is "overloading" the source, demanding a current greater than what it is capable of providing.
That lamp to be welded on C814 must in no case exceed 75W110V AC. that is to say that you can also use 60W, 50W, 40W, 25W, ... The "energy saving" or "low consumption" lamps are not suitable for this test.
Hello friend, I commented that I already found the voltage failure was the two filtering of the source that the c890 of 47uf and the c893 of 4.7uf were invested in the place of the other place them each in their place and the voltage is stable but the television does not turn on I give the ignition order the estanbay turns off like when it turns on but there is no high voltage nor does it feel activate the relay
Well friend, I told you that I already solved the TV, I told you after I realized that the small filters that are in the fountain were inverted, the place of the other one fix it, put them in place and the voltage stabilized but the TV did not turn on. I only turned off the LED as when it turned on but I did not do it when reviewing the diagram that the joansoler friend sent me I found that on pin 12 there was not 8.7 volts so that the jungle emits the horizontal frequency when checking the q801 it turns out that I was also invested fix it and the tv turned on
It turns out that I tested it by audio and video and it looked perfect but when trying on cable this screen was black it shows menu and everything else but the image of the cable did not give it but it was heard reprogram the eeprom and the fault persisted when touching the jungle With this finger, a balbarida warmed up, I decided to change it and it turns out that that was the cause the jungle at the end was also damaged, I have the TV in test, it has about 3 hours working and a perfect greeting to everyone and thanks for the help very grateful with all your advice
